夏元复
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- 姓名:夏元复
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博士生导师
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数理科学
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夏元复教授,男,1939年1月25日生于上海市,1959年毕业于南京大学物理系并留校任教。现为南京大学教授、博士生导师。是国家人事部授予的“有突出贡献的国家级专家”,政府特殊津贴获得者,俄罗斯科学院外籍院士。是国际著名的穆斯堡尔谱学专家,任国际穆斯堡尔谱学委员至今已二十年。曾任德国萨尔州立大学客座教授、日本京都大学反应堆研究所客座教授、日本国理化学研究所客座教授,并荣膺日本国文部省省长颁发的“杰出科学家”证书,“以表彰他在穆斯堡尔谱学领域国际性杰出贡献”。曾任中国核物理学会副理事长。现任中国核学会理事,江苏省核学会理事长,江苏省核应急专家委员会委员,中国科学院核技术重点实验室学术委员会委员。共主持和完成国家级科技项目十三个,省部级项目八个。获奖十三项。共撰写著作八册,在国内外核心期刊发表论文二百余篇。
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夏元复, Rongchuan Liu, Huaixian Lu, Lianwei Wang and Yuanfu Hsia
Nuclear Instrumenlts and Methods in Physics Research B76 (1993) 140-142,-0001,():
-1年11月30日
In this Paper the superparamagnetism of the oxidzed surface layer of fine iron paricles is reported. Fine iron particles in the range of size from 15 to 50nm with oxidized surface ayer were prepared by evaporation in nitrogen atmosphere. The sizes were measured by the BET method and transmission electron microscope (TEM). X-ray and electron diffraction analysis show that the particle is coposed of α-Fe core and a sufrface layer of Fe3O4. The thickness of the outer oxidized layer is about 2nm and is independent of the average diameter of the particles. The results indicate that the transition of the domain structure plays an important role in the superparamagnetic behavior of the oxide surface layer of iron particles. The emergence of the superparamag-netism at low temperature, may be a diagnostic of the transttion from the smgle domain to multi-domain structre for inner core. The criticle size of the single domain domain is esatimated at-about 40nm.
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【期刊论文】Local-realism violations in two-particle interferometry
夏元复, Xiao-hua Wu, , *, Rui-hua Xie, Xiao-dong Huang, and Yuan-fu Hsia
,-0001,():
-1年11月30日
Using a quantum-optical setting, we demonstrate local-realism violation for a maximally entangled state of two particles without using inequalities. Our proof can be generalized to all arbitrary entangled states for two particles.
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夏元复, Yuanfu Hsia and Hongqi Xiong
Hyperfine Interactions 94 (1994) 2053-2058,-0001,():
-1年11月30日
Y1.6Ca1.4V0.4sSn0.5Fe4.05O12 has been bombarded with a 0.56 GeV C6+ ion beam. The vacancies and vacancy clusters induced by the irradiation change the directions of hyperfine fields around the defects. The reduction of the magnetic hyperfine field is caused by the lower superexchnage field due to the formation of the O2- vacancies. The change of direction of the hyperfine field has also been observed in Mtissbauer spectra. X-ray diffraction showed that the defects give rise to an increase of the lattice constantof the samples.
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夏元复, YUANFU HSIA and HONGBO HUANG
Hyperfine Interactions 150: 33-50, 2003,-0001,():
-1年11月30日
The M
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夏元复, H, M, Widatallah, Y.F. Hsia, N. Fang, X.M. Lee
Physics Letters A 215 (1996) 326-330,-0001,():
-1年11月30日
The Brownian motion of suspended panicles in EBBA liquid crystal is studied by the Mossbauer technique. Different values are obtained for both the radius of the particles and their mean square displacement in the nematic phase and the isotropic one. This behavior is attributed to anchored, molecular textures on the particles" surfaces. The texture thickness is estimated from the Mossbauer data.
Mossbauer spectroscopy, Nematie liquid crystal, Brownian motion
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【期刊论文】Mossbauer Evidence for Ferromagnetic Ordering in Copper-Iron Cyanometallates
夏元复, XIA Yuan-Fu, YU Zhi, SONG Yong, HUANG Hong-Bo, YOU Xiao-Zeng, X. Z. Zhou, Z.W. Li, H.P. Kunkei, Gwyn Williams
,-0001,():
-1年11月30日
A novel member of the Prussian blue family, cu3Ⅱ [FeⅢ (CN) 6] 2. 3NH3·6H2O, was synthesized, in which NH3 ligands are in stochastic distribution. We present x-ray diffraction data, zero-field-cooled magnetization and field-cooled magnetization curves, Mössbauer spectra with/without an xternal Field of 5 T and a structural model. This Prussian blue analogue displays considerable magnetic hardness below the magnetic transition temperature Tc, which is about 19.8K. The coercive field determined from the magnetization hysteresis loop at 5 K was 2.76 kOe. The copper-iron cyanometallates have potentlal applications in the design of novel magnetic systems.
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【期刊论文】Brownian motion of suspended particles in an anisotropic medium*
夏元复, Y.E Hsia a, N. Fang a, H.M. Widatallah a, D.M. Wu a, X.M. Lee a and J.R, Zhang b
Hyperfine Interactions 126 (2000) 401-406,-0001,():
-1年11月30日
Some experimental results in the case of anisotropic media are at variance with the Einstein-Stokes formula of Brownian motion and the Singwi-Sjolander model. The dis-agreement comes from the anchor effect. The concept of "pseudoparticle" is introduced in order to retain the Singwi-Sjolander formalism. Mossbauer spectroscopy can be used to estimate the thickness of the anchored liquid-crystalline molecular textures forming on the surface of Brownian particles.
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【期刊论文】Magnetic Effect in Ca V Sn: YIG Induced by Energetic Heavy Ions
夏元复, Yuaniu Hsia*, Hongqi Xiong**, Abdelilah Musa All*** and Jintong Zhang
Defect and Diffusion Forum Falsd 206-207 (2002) pp. 112-122,-0001,():
-1年11月30日
The use of Gev heavy ion beam irradiation has auracted much attention in the field of material science. In the case of garnets, the superexchange inreraction among the maguetie cations in the materials is very sensitive to the electronic stopping power of the beam. The induced microstructure and magnetic propertics of irradiated Ca V Sn: YIG samples have been characterized by means of Mossbauer spectroscopy, high resohution electron microscopy (HREM), X-ray diffraction (XRD), positron annihilation techniques (PAT), vibrating sample magnetometry and ferrimagnetic resonance (FMR). The experimental results are discussed in this paper.
Imadiaton Effect, Yttriumtron Garret
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